Cast
Michael Wilding
Captain (uncredited)
John Mills
Tom
Alfred Drayton
Direktor
George Merritt
German: German Shelter Marshal
Frederick Piper
Malta official (uncredited)
Albert Lieven
Gunter
John Stuart
Royal Navy: Naval Officer
Bernard Miles
Royal Navy Mate
Robert Morley
Von Geiselbrecht
Morland Graham
Civil Service
Ronald Adam
German businessman (uncredited)
Cyril Chamberlain
Press
George Woodbridge
Quisling
Ronald Shiner
Shipping clerk (uncredited)
Will Hay
Skipper
Michael Rennie
George
Frank Cellier
Schneider
Marius Goring
German Propaganda Officer
Austin Trevor
U-boat Captain
John Boxer
Press
Thora Hird
German barmaid (uncredited)
Leslie Banks
Taylor
Michael Redgrave
Russian
John Williams
Voice over (uncredited)
Manning Whiley
Naval officer (uncredited)